Affiliation:
1. Department of Management and Engineering (DTG), University of Padova, 36100 Vicenza, Italy
2. Department of Electrical Engineering, Aswan University, Aswan 81528, Egypt
Abstract
This paper discusses bidirectional step-down topologies that enable the interface of the 400V unipolar DC microgrid with the European low-voltage three-phase AC grid. The study compares three single-stage non-isolated topologies, namely, the seven-switch buck converter, Swiss converter, and Y-converter, based on semiconductor stresses and losses, magnetic component sizes and losses, and heat sink sizes. The analysis is conducted for a 10kW converter designed for small commercial or residential use. The results indicate that the Y-converter has superior overall performance compared to the other topologies, making it a potentially better candidate for this application. A 10kW prototype of the Y-converter is constructed. It is demonstrated to have a peak efficiency of 99.26% and an efficiency of 97.47% at the rated output power.
Funder
Italian Ministry of Education, University, and Research
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction